on one hand it supported the attacks on assad and says the days are numbers. extremist groups are now a big part of the fight and the power vacuum in syria to help themselves to weapons and ammunition. >> syrian opposition is more fragmented. just today a top rebel leader resigned in frustration so if assad falls, the allies don't have any clear idea who would take over. >> rick: leland, thanks very much. >> heather: despite death threats former pakistani president is back in pakistan. he has been in self-imposed exile since resigning four years ago. the former president considering a possible political comeback despite charges he failed to provide proper security for the former prime minister who was assassinated. musharraf is seeing as an enemy by the taliban after the attacks of 9/11. >> rick: and back home now, the f.b.i. joining in the search for a missing ivy league student who was last seen on the campus of brown university. that is providence, rhode island. more than a week ago he has not been heard since. the search is expanded in the northeastern par